V2X Sidelink Reception Using MSD Against Uplink Distortion

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Solution Overview

Problem

The occurrence of harmonics and intermodulation distortion components in uplink signals can lead to a failure in meeting the reference sensitivity power level for downlink signals in mobile devices, particularly in 3GPP LTE and NR systems.

Innovation Solution

A device configured with a transceiver to transmit uplink signals in operation band 20 and receive sidelink signals in band n38, with applied Maximum Sensitivity Degradation (MSD) values for different bandwidths, including 10.7 dB for 10 MHz, 7.7 dB for 20 MHz, 5.8 dB for 30 MHz, and 4.7 dB for 40 MHz.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If uplink signal transmission is performed in operation band 20, then communication functionality is enabled, but harmonics and intermodulation distortion components are generated that degrade downlink signal reception sensitivity

Engineering Contradiction:

Improvecommunication functionalityVSAvoidsensitivity degradation

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies Maximum Sensitivity Degradation (MSD) values that are adjusted according to the bandwidth of the sidelink signal reception. Different MSD values (10.7 dB for 10 MHz, 7.7 dB for 20 MHz, 5.8 dB for 30 MHz, 4.7 dB for 40 MHz) are used to compensate for the sensitivity degradation caused by uplink transmission in band 20, thereby resolving the contradiction between maintaining communication functionality and preventing sensitivity degradation.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If reference sensitivity requirements are strictly maintained, then signal reception quality is ensured, but uplink transmission power must be reduced limiting communication performance

Engineering Contradiction:

Improvesignal reception qualityVSAvoidcommunication performance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent allows partial relaxation of the reference sensitivity requirement by applying MSD values. Instead of maintaining strict reference sensitivity (which would limit uplink power), the system accepts a controlled amount of sensitivity degradation (up to the MSD value) in exchange for enabling higher uplink transmission power and better overall communication performance.

Inventive Principle:

Principle #16Partial or excessive action

3Strength

If uplink transmission power is increased, then communication coverage is improved, but harmonics and intermodulation distortion increase causing sensitivity degradation

Engineering Contradiction:

Improvetransmission powerVSAvoidharmonics and intermodulation distortion

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful effect of harmonics and intermodulation distortion into a manageable parameter by quantifying the sensitivity degradation and applying corresponding MSD values. This allows the system to operate at higher transmission powers (generating more harmonics) while still meeting adjusted sensitivity requirements, effectively turning the harmful distortion into a controllable design parameter.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS20260040231A1Method for applying MSD and apparatus thereof

Publication Date: 2026.02.05 LG ELECTRONICS INC

AI summary

A device configured to operate in a wireless system, the device including: a transceiver configured with a V2X (Vehicle to Everything), a processor operably connectable to the transceiver, wherein the processer is configured to: control the transceiver to transmit an uplink signal via operation band 20, control the transceiver to receive a sidelink signal vis operation band n38, wherein a value of Maximum Sensitivity Degradation (MSD) is applied to a reference sensitivity for receiving the sidelink signal.